According to reports, the fake accounts have links with jailed Trinamool leader Anubrata Mandal, the CBI has alleged.
The central investigative agency further accused that the accounts were used to launder 10 crore worth of transactions.
The CBI sleuths have recovered several documents, pen drive and other incriminating articles, the reports said.
CBI officials drilled the bank's manager and collected documents, sources said.
On Wednesday, the Calcutta High Court bench comprising Justices Ajay Kumar Gupta and Joymalya Bagchi rejected Anubrata’s plea seeking bail on grounds that he had been in custody for over 145 days in connection with the case.
The TMC Birbhum district president was arrested by the CBI in connection with the case.
CBI claimed that the TMC strongman might influence witnesses being probed by it.
The HC bench said that the court is not inclined to grant the prayer at this stage.